Pencil-sharpener.



PATENTED JAN.14, 1908.

C. SPIRO.

PENCIL SHARPENER.

APPLICATION FILED SEPT. 25,1907

m T N E W A 80 In the rawing:Fi

STATES. PATENT. osFro SPIRO. OF NEW YORK, N. Y.

ration-manna.

invention relates to a pencil sharpener, and particularly to a construction embodying a socket and fixed blade relative thereto.

The invention has'for an object to rovide a novel and improved construction 0 sharp-' "ener wherein a circular blade having a continuous cutting edge is dis osed at an angle to the axis of the pencil hol ingsocket so as to produce a shearing cut 'as the pencil is rotated in said socket.-

A further object of the invention is to pro- 'vide a lurality of sockets cooperating with the bl e so that either the wood of the penoil may be cut away'or only the lead as found desirable.

Other and further objects and advantages of the invention will be hereinafter fully set forth and the novel features thereof defined by the ap nded (Haims.

re 1 is a side elevation of the invention; ig. 2 is an end elevation thereof; Fig. 3 is an elevation of the back; Fig. 4 is a vertical section on the line 4-4, Fig. 3; Fig. 5 is an end view at the op-. 85 posits endfrom Fig. 2; F' 6 is a detall per spective of the cutter bl e, and Fig. 7 1s a section on the line 77, Fig. 1.

Like numerals refer to like parts m the severalfigures of the drawing.

Referring to the drawing, the numeral 10 designates the ncil receiving socket the aperture of whic tapers adually from one end to the other so as to orm a point receiving opening 11 into which the lead of the penl oil may extend for the purpose of protecting the same and also centering the pencil while cutting the wood therefrom. Disposed diagonally to the longitudinal axis of this socket is the supporting plate 12 provided with the v to central aperture 13, preferably formed inteill with the socket 10. Upon the u per surace'of the socket 10 and at one si e of the plate 12 is apoint receivmg' socket 14 hapirzg 1 a tapered interior in order to present the lpeciflcation of Letters Patent. was and September 25. 1001. Serial In. 304.411.

- of the pencil for sharpening Patented Jan. 14, 1908.

g Theup rpm-'55 tion 0 he socket 10 at the base of t e p ate 12 is cut away as shown at 15, this portion extending transversely of and diagonally to the longitudinal axis of the socket 10. Upon the face of the plate 12 the cutter blade 16 is mounted, this blade being of thin wafer steel and provided with a continuous circular cutting edge 17. This form of blade forms the most desirable cutting means and can lie repeatedl sharpened in a convenient manner. The b ade is pivotally mounted at the central aperture 18 by means of the clamping screw 19 which passes therethrough and is threaded into the aperture 13 of the plate 12. 2O bearing upon the blade so as to secure an extended Contact for retaining the blade in its adjusted position. The adjustment of the blade may be effected in any desired manner when the screw is slightly loosened, for instance, by means of inserting an object in the aperture 21 by which the lads may be rotated on the screw. For the purpose of determining the extent of this rotation and also the area of the surface which has been previously used a series of radial graduations 22 are ormed on the blade. It will be observed that the plate 12 and the blade carried thereby are dis osed diagonally to the longitudinal axis of t e socket 10 and 86 that the edge of the blade is presented to the pencil in a plane traversing the path of a cordof the pencil socket toward the direction of the travel of the pencil, while the circular edge of the blade extends diagonally across 90 the surface to be cut thus producing a shearing out upon a diagonal line crossing the axis of the encil transversely thereof. In t e use of the invention, the wood of the pencil is first cut away in the pencil 9; socket there being aclearance aperture to receive the lead which need not be cut at this time, and the danger of breaking the point owing) to the difierence in the cutting resistance etween the wood and lead is obviated and the full thickness of the point may be retained. After the wood is cut away to the proper extent the pencil is then inserted into the point socket and the point finished by a rotation againstthe peri hery of the blade. In this manner the woo may be cut away to the extent desired and the lead pointed as'the point becomes worn 05 This screw has a shoulder 70' f i any without the necessity of again cutting the projects beyond the edge thereof for sufiiwood as the point can be sharpened very quickly by turning the pencil against the blade. As before stated, the disposition of this blade is such as to permit the cutting with least resistance and therefore avoids the breaking or splittin of the pencil, while the plate upon which t is blade is mounted cient distance to protect the cutting edge of the blade. The use of a blade having a circular cutting edge permits its formation from wafer steel or other thin material which can be conveniently sharpened and replaced, and the entireperiphery thereof can be used,

1 the position or shift thereof necessary being indicated by the graduations thereon.

This form of blade also ermits the use of a plu- 'rality of sockets as efore described adapted to contact at different points with a single cutting surface so that either the wood or lead of the pencil may be sharpened as found desirable. It will therefore be apparent that the invention presents a simple, economically constructed and efficient form of pencil sharpener in which the greatest length of surface for the blade may be secured.

Having described In invention and set forth its merits, what claim and desire to secure by Letters Patent is:-

1. A encil sharpener comprising a pencil socket aving a sup orting plate extended therefrom, and a bla e having a circular cutting edge disposed at an angle to the longitudinal axis of said socket.

2. A pencil sharpener comprising a pencil socket having a supporting plate extended therefrom, and a blade having a circular cuttin edge disposed at an angle extending diagona ly to the longitudinal axis of said socket.

3. A encil sharpener comprising a pencil I I socket aving a sup orting plate extended therefrom, and a bla e having a circular cutv ting edge disposed at an angle to the longitu l dinal axis of said socket and in a plane trav-v ersing the path of a cord thereof.

4. A pencil sharpener comprising a pencil -socket provided with a sup orting plate disposed dia onall to the ongitudinal axis thereof, a lade aving a continuous circular cutting edge pivotally mounted upon said plate, and; means for retaining said blade in djusted position.

' I i upon said plate, and a clamping screw extending through the bhade and threaded into said plate.

7. In a pencil sharpener, a pencil socket, a supporting plate extended therefrom, a blade having an adjusting a erture and radial graduations and provide with a continuous circular cutting edge mounted upon said plate, and a clamping screw extendln tlllrough the blade and threaded into sal ate.-

P 8. In a pencil sharpener, a pencil socket, a supporting plate extended therefrom, a curved blade mounted u on said plate, and a point socketdisposed a jacent to said blade.

9. In a pencil sharpener, a pencil socket, a su porting plate extended therefrom, a cir: culhr blade mounted upon said plate, and a point socket disposed between one end of the pencil socket and the periphery Ofsaid blade.

10. In a pencil sharpener, a pencil socket, a supporting plate extended therefrom, a circular blade mounted upon said plate, a oint socket disposed between one' on r of sai encil socket and the periphery of said is ads, and a clamping screw threaded into said plate and having a shoulder to engage the surface of said blade.

11 In a pencil sharpener, a pencil socket provided at one end with a po1nt receiving aperture, a supporting plate extended from said socket, a blade mounted upon said plate and having a continuous circular cutting edge, and means for permitting rotative adjustment of said blade.

12. In a pencil sharpener, a pencil socket provided with an aperture in its upper face, a

sup orting plate carried by said socket, and a ade having a curved cutting edge disposed at said aperture and extending diagonally to the ion itudinal axis of said socket.

13. In a penci sharpener, a pencil socket provided with an aperture in its upper face, a sup orting plate carried by sai at said aperture and extending diagon the longitudinal axis of said socket, and a point-socket disposed tangentiallyto said curved blade.

14. A pencil sharpener comprising a body portion having a encil socket, a supporting plate extended diagonall to thelon 'tudinal axis of said socket with a point soc et inte osed between the rear end of the pencil soc et and the periphery of said plate, and a circular blade mounted upon said plate.

15. In a encil sharpener, a supporting frame provir ed with a pencil socket and a po nt socket in combination with a rotatable ad ustable blade in cutting relation with both sockets. g 16. In a pencil sha frame, a blade mounte thereon, and independent pencil and point sockets each havmg their line of introduction for the pencil socket, a -bla e having a curved cutting edge diiplosed y to ener, a supporting 128 single cutting edge of the blade.

17. In a. pencil sharpener, a-frame {Kmvided with a pencil socket and a point so 5 and a blade mou ted in said frarne having a single cutting edge disposed in cutting 1" tion to both sockets.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES SPQIRO.

Witnesses:

FRANK R SHORLIN, Enwn. -E, JONES. 

